My dad (who is a toxic piece of shit, by the way) is legitimately mad that he lost his hair when he was literally 20-25 years younger than I am now (in his 20s) and that I have all my hair.
Even my mom's dad and brother lost their hair. My grandfather in his 20s and uncle probably kept it into his 30s.
It's mysterious. It's receded a little bit and is slightly thinner on the right side, but it's hardly noticeable when my hair is grown out. I have to push my hair back up my head and point it out for it to even be noticeable.